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energy usage

New York Bans Some Crypto Mining | Earth Wise

December 13, 2022 By EarthWise Leave a Comment

New York bans some cryptocurrency mining

Crypto mining, the arcane process by which cryptocurrencies are generated, is incredibly energy-intensive.  As of this past summer, global electricity usage for the activity is as much as 240 billion kilowatt-hours per year, which is more than many entire countries use (for example Australia and Argentina.)  Crypto mining consumes as much electricity as all the conventional computer data centers in the world.

All that energy usage is problematic for the environment, but a growing practice has made it far worse.  Crypto miners have been re-powering decommissioned fossil fuel power plants to produce electricity strictly for mining operations.  Doing so eliminates the climate benefits achieved by shutting down those plants.

The New York State Legislature passed a bill in June that would place a two-year moratorium on permits to re-power fossil fuel plants.  It does not prevent crypto mining from existing generation sources.  The bill had sat on the governor’s desk until after the recent election.   But in late November, Governor Hochul signed the bill despite considerable lobbying against it.

The temporary ban was heavily opposed by cryptocurrency industry groups, to no surprise.  While some states actually offer tax incentives to lure crypto mining operations, supporters of the legislation hope that New York’s action may cause others to follow its lead and stop the reactivation of old fossil fuel plants.

The two-year moratorium will allow time to properly evaluate the impact of the crypto mining industry on the state’s climate goals.  It is pretty obvious that reactivating old, retired fossil fuel power plants as an energy source is a move in the wrong direction.

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New York Enacts 2-Year Ban on Some Crypto-Mining Operations

Photo, posted February 27, 2021, courtesy of Ivan Radic via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

A Smart Window | Earth Wise

March 31, 2022 By EarthWise Leave a Comment

New smart window technology to reduce energy consumption

Researchers at Oxford University have developed a new adaptable smart window technology that has the potential of reducing the energy usage of the average home by a third.

The technology uses a spectrally tunable low-emissivity coating that can control the amount of heat that comes into a room without affecting the quality of the light that enters.

The thermal energy from the sun’s infrared rays is absorbed by the glass and then is re-emitted as heat.  That heat can either be used to warm the room using transparent electrical heaters embedded in the glass or can be reflected away to cool the room.  The windows can change according to seasonal needs.

The researchers built a prototype using a material called an active chalcogenide-based phase change material.  When it is cold, the infrared rays from the sunlight are harvested and used to heat the building.  When it is warm, the new glass can switch state to reflect the heat and reduce the need for air conditioning.  The active phase change material is adjustable so that the amount of heat absorbed or reflected can be tuned for precise temperature control.  There is essentially no effect on visible light passing through the window.  Current low-emissivity glass for windows can reduce heat transfer, but its properties cannot be altered according to seasonal needs.

The researchers estimate that using windows fitted with the new prototype glass – including the energy required to control the film – would save 20 to 34% in energy usage annually compared to double-glazed windows found in many modern homes.

A spinout company from Oxford called Bodle Technologies is collaborating with two existing industrial partners to develop the technology further.

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New adaptable smart window coating could help heat or cool a home and save energy

Photo, posted April 26, 2008, courtesy of Lima Andruska via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

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